Heater



E. F. TWEEDY.

HEATER.

APPLICATION FILED IAN. 31| I9IB' Patented July I., 1919.

A TTOR/VE'V dll titl

UNITED sTATEs PATENT oEEIoE.

HEATER.

To all whom it may concern:

Be :it known that I, EnMUND FRANCIS TWEEDY, a citizen of the UnitedStates, and

Vresident of the town of Glenbrook, county of Fairfield, State ofIConnecticut, .have invented certain new and useful ImprovementsinI-Ieaters, of which the following is a specification.

The invention herein 'set forth is a device wherein heat is generated orproduced, and the heater whic I have designed is intended to operate anddisseminate its heat for useful purposes periodically, and'while I havediscovered that my heater may be utilized for a great number ofpurposes, I will describe it as it is shown in the drawings whichaccompany this application, and wherein my heater is applied to aprinting press for applying heat to the paper before itleaves theprinting press and after theV printing operation has been accomplished.

A number of devices have been designed, utilized and patented for thepurpose of drying the ink impressed upon paper to prevent what iscommonly termed oifset of the ink, anda number 'of devices have beenemployed to remove the static electric charge from the paper, as it isthe general belietl that with the static. electricity removed,

odset7 of the ink is prevented to a great extent due tothe fact thatsheets of paper devoid of static electricity will not adhere one toanother as firmly as when static electricity or currents are present. lp

I believe, as do many others, that the re moval ofthe static electricityalone is not all that is necessary to prevent odset. I be lieve that itis necessary to warm the paper and ink to an appreciable degree toaccomplish rapid drying of the In y 'Io obtain the required heat, theprinted paper'has, in the past, been caused to pass over an open gasdame. The use of an open gasl dame constitutes a re hazard ofconsiderable magnitude, besides heating and vitiating tht air of thepress room, and for these reasons, electrical 'heaters have beenemployed over or adjacent to the sheetl d u-ring its passage from theross or printing plates. '.llhel use of ain electric heater, the heatingelement of whichisdesigned to con-v stantly radiate heat tothesurrounding air is expensive, and therefore, 'in most instances, the`open gas fiame has* been employed. l I

I have discovered that the application of Specification of LettersPatent.

Application mea January si, 191s. serial in. 21am.

Patented July 1, 191e.

heat is only necessary during that period of time when the printed sheetis being delivered to the iy or from the delivery carriage, and I havefurther discovered that this space of time constitutes about10% oftheentire period of feeding, printing and delivery operations, andtherefore, we may roughly presume that 90% of the energy consumed by anopen heater 'is wasted. With this in mind, I have designed and devised aheater which will and it is an important object of my invenbe laterdescribed,

tion to so construct my heater, that the radiation of heat therefromW-ill be possible, only when the printed paper is actually between thesections of the heater, except for a constant slight unavoidable loss ofheat; by so doing, it is possible to usefully utilize practically all ofthe heat generated, and further, it is possible to utilize heatingelelneiits of smaller capacity, thus reducing the cost of operation. l

The construction and operation of my device will be set forth as thespecification progresses.

rThe following is what I consider a good means of carrying out myinvention, and the accompanying drawings should be referredto fora.complete understanding of the description which follows:

In the drawings:

Figure I shows in diagramthe said por tion of the printingpress with mydevice attached.

Fig. 2 is a sectional view of the device employing an electricallyheated element as the source of heat.

Fig. 3 shows an electrically heated device of modiied construction.

Fig. tis a sectional view of the device heated by means ofugas,employing the principle of surface combustion.

Similar referencenumerals indicate like parts in all 0I the figuresWherethey appear.A

In Fig. I, I have shown one side of a printing press and, therefore, itmust be understood that in printing presses, or devices of considerablewidth, and where a long heating element is employed, certain ite ies

parts of the device shown in Figa-1 will be (`onnected to the frame 1,or to a suitable support, is a bracket 3 provided with ways 4, andmovable in these ways is a projection 5 from a plate which I may term acover 6.

An extension from the bracket 3 or from other suitable means for thesupport thereof, connects with a member which I may later refer to as aheater box 8, and this member S is retained in a relatively stationaryposition.

Pivotally connected to the lower end of the extension 5 is a link 9, theother end of which is pivoted to a sector 10, and this sector issupported upon a shaft 11. The spring 12 tends to return the sector 10to the position in which it is shown in Fig. 1, and a projection orfinger 13 secured to the sector 10 extends into the path of movement ofthe delivery table or carriage by which the finger 13 and sector 10- andparts connected therewith are operated.

The shaft 11 may extend across the press and at the other side of thepress and upon the shaft 11, I may place another sector 10, or a lever,connected b v means of a link 9 to a second projection from the cover 6,and by means of which I may obtain a simultaneous and equalized movementof the cover 6.

As shown in Fig. 3, the cover 6 may be a metal tray having a projection5 formed integral therewith, and within the cover 6, I place a suitablematerial which should not only be refractory, but should also possesslow thermal conductivity. I desire that this material 11 within thecover 6 should intermittently store and then radiate appreciablequantities of the heat. generated within the member 8.

When electricallyv heated, the member 8 will consist of a box filled orlined with a material 15 similar to that referred to as contained withinthe cover 6, and embedded in or supported upon this material is a.plurality of coils or strips of metal or other suitable substanceshaving electricalconductivity and comparatively high resistance. It isin v desire that the coils 16 should heat up during the passage ofelectric currents therethrough, and further it is my intention anddesire that the 4heat generated in the coils should not radiate to anyappreciable extent from the box or cover when the cover is .in positionclosing the box.

The operation of the device just described is generally as follows:

When the delivery table 2 is moved forward to deliver the sheet thetable impinges upon the finger' 13 partially rotating the sector 10, andshaft 11, drawing downward the links 9 and projections 5 thereby movingthe cover 6 away from the box 8. The printed sheet will pass Ibetweenthe box proper and the cover. and will be lsubjected to the infiuence ofthe heat generated by the coils 143 and that absorbed by and radiatedelectrically heated element.

from the material wit-hin the box, and cover. It is obvious that whenthe cover G is in position closing the boX, the material 11 within thecover will be influenced by the coils 16 and will be heated thereby, andthe heat within the material 14 and 15 together with that given off bythe heating element itself is the useful heat that I depend upon fordrying the paper which is caused to pass between the cover 6 and thelbox 8. Upon the return of the delivery table 2, the cover G will againclose the box and the interior of the cover and box will again absorbthe heat that would otherwise be wasted.

I desire to provide a means whereby the currentl will not be consumed bythe heating coils 16 during the time when'the press is not in operation,and for that purpose, I provide an automatically operating switch devicewhich consists of a pivoted blade 17 rotated in one direction by aspring 19.

A link 18 connects with this blade, and with a projection 2O which is,in turn, rigidly connected to the pivoted armature 21. A coil 22energized through the leads 23 and which are connected to the mainstarting box or starting switch of the printing press, lifts thearmature 21 and by means of the members 18 and 20, causes the blade v17to contact through carbon or other suitable contact elements, with ablock 17 which block is connected, preferably, through a fuse to oneside of the heater.

One side of the supply line S is connected through another fuse with thepivot or shaft upon which a blade 17 rotates and the other side of thesupply line S may be connected directly to the heater.

When the main switch or main starting box is opened, and the current cutoti' from the motor which operates the press, the coil 22 will bedenergized, the armature 21 will not be attracted by the coil, and thespring 19 will move the blade 17 away from the contact point 17.

In Fig. 3, I show a heater wherein the coils are supported upon thesurface of the material Within the box.

In Fig. 4, I- show a cover member 25 of a construction generally similarto the cover 14, and this cover 25 also contains a refractory substanceof low heat conductivity, as indicated at 26, and through the refractorsubstance and the cover, I provide a plura ity of perforations asindicated at 25', for the escape of the products of combustion when thecover is in place.

The heater shown in Fig. 4 has an exterior casing 27 and aninteriorlining 28, of refractory material, possessing low heatconductivity. The function of this heat insulating and refractory liningis entirely similar to that already described in connection with a typeof heater box employing an This typeof lltl Lacasse heater is intendedto operate on what is known as .the surface combustion prmclple,

wherein th gas and the oxygen necessary imity to the heater, obviatingthe re hazard and the possibility of scorching. The plate 32 should fitloosely within the casing to allow the products of combustion to escape.The general operation of this device is similar to that shown anddescribed in connec tion with the electrical heater.

I desire it understood that the shape of my heater may be changed atwill, that thel relative dimensions and sizes of parts may be varied,and other modifications made to allow my device to be employed forpurposes other than in conjunction with print ing presses. I intend,however, that my heater should at all times, be constructed forintermittent operation, for it is by such operation that I obtain higheiciency -and low operating cost.

Having carefully and fully described my invention, lwhat I claim anddesire to secure by Letters Patent is 1. A heater for intermittentservice consisting of a heating element and means for inclosmg it, andmeans for opening said inclosing means and means for passing material tobe heated between the parts of andL out of intimate contact with saidinclosing means.

2. A-heater'comprising a container, a refractory and heat insulatingmaterial within said container, and heating means within saidcontainer,and an automatically operlocalizes the comated cover for said container,andheat insulating and refractory material within said cover. y

3. A heater comprising a body member,

heating elements arranged therein, andv means for supporting said bodymember, a cover'having a projection at each end thereof, and guidesadapted to support said cover, a link and cam connected to saidrojections and means for operating said 1i and cam .to periodicallyremove and replace said 4. A heater in two parts and having a pluralityof heating co11s in one said part and automatically operated means formoving the other said part and means for automatically connecting` anddisconnecting the current supply to said coils to control the heatin ofboth said parts.

5. Tie combination with a printing press of a heater comprising a' body.member, a stationary support connected to said press and to said bodymember, a cover for sai heater, guides for said cover and a link andsector connected with said cover and with said press for periodicallyopening and closing said cover.

6. The combination with a printing press of a heater and a covertherefor, a finger in the line of travel of an operable portlon of saidress and a cam and lever operated by said nger for automatically andalternately opening and closing said cover.

7. T he combination with a printing press of a heater, a movable coverfor said heater means upon 4said press for supportin said heater, andguiding the cover thereo and means such as a sector and resilient memberfor alternately opening and closing said cover during the operation ofsaid press.

Signed at New York city, in the county and, State of New York this 18thday of Jan., 1918.

